CONTENTS. iii 
Art. XXII. Account of the Earthquake at Kutch on the l6th 
June 1819* Drawn up from published and 
unpublished Letters from India, - 120 
XXIII. Remarks on Professor Hansteen’s Inquiries 
concerning the Magnetism of the Earth,” 124) 
XXIV. Notice respecting some New Species of Lead-ore 
from Wanlockhead and Lead Hills. By Da- 
vid Brewster, LL. D. F. R. S. Lond. & Ed. 
&c. - - - 13 $ 
XXV. A Brief Account of Messrs Perkins, Fairman 
and Heath’s Invention for Perpetuating En- 
gravings upon Steel, or other Metals, With 
a Plate, - 3-140 
XXVI. Some Observations on the Instinct and Opera-? 
tions of Bees, with a Description and Figure of 
a Glazed Bee-^Hive. In a Letter from the Re- 
verend William Dunbar, Minister of Apple-, 
garth, to the Very Reverend Principal Baird, 143 
XXVH. Historical Account of Discoveries respecting the 
Double Refraction and Polarisation of Light. 
Continued from Vol. ii. p. 171- Period II. Con- 
taining an Account of Huygens’ Theory of 
Double Refraction, - 148 
XXVHI. Outline of Professor Mohs’s new System of Crys- 
tallography and Mineralogy, - 154 
XXIX. Description of the Patent Water- Pressure Epgine, 
Invented by Mr James Dickson, Engineer, 
Communicated by the Inventor, ' - 176 
XXX. On the Retrograde Variation of the Needle. By 
Colonel Beaufoy, F, R. S. &c. &c. In a Let- 
ter to Dr Brewster, - - 179 
XXXI. Proceedings of the Royal Society of Edinburgh, 181 
XXXH. Proceedings of the Wernerian Natural History So- 
ciety, - « - 183 
XXXIII. Proceedings of the Cambridge Philosophical So- 
ciety, ^ - - 184 
XXXIV. Proceedings of the Astronomical Society of Lon- 
don, - - . 189 
XXXV. Scientific Intelligence, - I9I 
I, NATURAL philosophy. 
Astronomy. 1 . Mr Dick’s Observations on Venus, 19I 
Optics. 2 . Distant Visibility of Mountains. 3 . Hauyne, 192 
